My screen has weird colors (Garmin vivoactive 4s)

I bought my vivoactive 4s two weeks ago. Yesterday, around 10 p.m I noticed a blue tint on the edge (see pictures). Although, on the morning now, the blue tint is gone. So it disappears after a while. I have noticed the tint a couple of times before, and I wonder if it should be like this? Is there something wrong with my watch? 

(The tint is placed ont left side)

On the second picture the screen is weird as well

Is this normal? Have you guys encountered this problem as well?